My cat is smart.

[moriah]

I found him asleep on my new heating pad, which annoys TF out of me because it shuts off after an hour (c'mon, 3-4 hours, please)

I was surprised to find it warm, and realized he'd figured out how to push the buttons walking on it to get it turned on.

I would have gotten a picture, but it was just too much a "perfect snuggles with sleepy kitty" moment to resist. Then, of course, the thing beeped turning off, scared him, and I was grateful he had been kneading through my fuzzy robe. I could still feel it.

[RockRaven]

1. I think I've seen heating pads for pets which activate based on pressure/weight...

I don't know any names/brands, though.